03MAR03 . ... Once they give you the subset of the data you want, you need to have another program process it. ... The search and extraction of the data is fast (instantaneous to the user with an array of 325000 entries). idl example: find all the scans using lbw (rcv=5) below 10 degrees za with their center frequency within 5 Mhz of the airport radar frequencies: 1330,1350. ind=where((slar.rcvnum eq 5) and (slar.zaavg lt 10.) and ((abs(slar.freq-1330) lt 5) or (abs(slar.freq-1350) lt 5)) . ...